The Annual Citizens Bank Pops by the Sea concert, featuring Maestro Keith Lockhart and the Boston Pops, takes place on the Hyannis Village Green, with preshow 1 to 4 p.m., concert 5 to 7 p.m., with special guest conductor Greg Skomal. Tickets and information: 508-362-0066.

Curtis Martin gives a presentation on 19th-century whaling, 2 p.m. at Brewster Ladies' Library, 1822 Route 6A. Learn how men were recruited and what life was like on the dangerous, storm-tossed seas. Free talk. 508-896-3913.